title: Composite resin vs resin cement for luting of indirect restorations: comparison of solubility and shrinkage behavior.
abstract: The aim of this study was to evaluate relationship between shrinkage development and early solubility of two commonly used luting materials, a self-adhesive cement (GCem chemical and light cured) and composite resin (Tetric). Linear displacement, shrinkage forces and leaching of UDMA from specimens immersed in 75% ethanol/25% water were measured. The least amount of linear shrinkage (33.0±2.9 µm) and polymerization force (4.1±0.3 kg) was observed in Tetric. UDMA leaching (% µg/mL) was the following: chemically cured GCem (4.2±0.2)>light cured GCem (1.5±0.1)>Tetric (0.1). Shrinkage development in the early stages of polymerization was much slower in the self-cured specimens in respect to light cured ones. With the chemically cured self-adhesive cement, incomplete materials' setting during the initial stages after polymerization favored monomer leaching from the cements' mass.
authors.affiliation: Division of Cariology and Endodontics, School of Dentistry, University of Geneva.
authors.forename: Tissiana
authors.initials: T
authors.lastname: Bortolotto
authors.forename: Davy
authors.initials: D
authors.lastname: Guillarme
authors.forename: Daniel
authors.initials: D
authors.lastname: Gutemberg
authors.forename: Jean-Luc
authors.initials: JL
authors.lastname: Veuthey
authors.forename: Ivo
authors.initials: I
authors.lastname: Krejci
mesh_terms: D003738:Dental Cements / Q000737:chemistry*; D003793:Dental Restoration, Permanent; D008422:Materials Testing; D058105:Polymerization; D012117:Resins, Synthetic / Q000737:chemistry*; D012995:Solubility
chemical_list: D003738:Dental Cements; D012117:Resins, Synthetic